linux/drivers/hwmon/adt7470.c

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/*
* A hwmon driver for the Analog Devices ADT7470
* Copyright (C) 2007 IBM
*
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/log2.h>
#include <linux/kthread.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
#include <linux/util_macros.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
/* ADT7470 registers */
#define ADT7470_REG_BASE_ADDR 0x20
#define ADT7470_REG_TEMP_BASE_ADDR 0x20
#define ADT7470_REG_TEMP_MAX_ADDR 0x29
#define ADT7470_REG_FAN_BASE_ADDR 0x2A
#define ADT7470_REG_FAN_MAX_ADDR 0x31
#define ADT7470_REG_PWM_BASE_ADDR 0x32
#define ADT7470_REG_PWM_MAX_ADDR 0x35
#define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
#define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
#define ADT7470_REG_CFG 0x40
#define ADT7470_FSPD_MASK 0x04
#define ADT7470_REG_ALARM1 0x41
#define ADT7470_R1T_ALARM 0x01
#define ADT7470_R2T_ALARM 0x02
#define ADT7470_R3T_ALARM 0x04
#define ADT7470_R4T_ALARM 0x08
#define ADT7470_R5T_ALARM 0x10
#define ADT7470_R6T_ALARM 0x20
#define ADT7470_R7T_ALARM 0x40
#define ADT7470_OOL_ALARM 0x80
#define ADT7470_REG_ALARM2 0x42
#define ADT7470_R8T_ALARM 0x01
#define ADT7470_R9T_ALARM 0x02
#define ADT7470_R10T_ALARM 0x04
#define ADT7470_FAN1_ALARM 0x10
#define ADT7470_FAN2_ALARM 0x20
#define ADT7470_FAN3_ALARM 0x40
#define ADT7470_FAN4_ALARM 0x80
#define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
#define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
#define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
#define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
#define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
#define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
#define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
#define ADT7470_REG_PWM12_CFG 0x68
#define ADT7470_PWM2_AUTO_MASK 0x40
#define ADT7470_PWM1_AUTO_MASK 0x80
#define ADT7470_PWM_AUTO_MASK 0xC0
#define ADT7470_REG_PWM34_CFG 0x69
#define ADT7470_PWM3_AUTO_MASK 0x40
#define ADT7470_PWM4_AUTO_MASK 0x80
#define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
#define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
#define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
#define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
#define ADT7470_REG_CFG_2 0x74
#define ADT7470_REG_ACOUSTICS12 0x75
#define ADT7470_REG_ACOUSTICS34 0x76
#define ADT7470_REG_DEVICE 0x3D
#define ADT7470_REG_VENDOR 0x3E
#define ADT7470_REG_REVISION 0x3F
#define ADT7470_REG_ALARM1_MASK 0x72
#define ADT7470_REG_ALARM2_MASK 0x73
#define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
#define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
#define ADT7470_REG_MAX_ADDR 0x81
#define ADT7470_TEMP_COUNT 10
#define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
#define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
#define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
((x) * 2) + 1)
#define ADT7470_FAN_COUNT 4
#define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
#define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
#define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
#define ADT7470_PWM_COUNT 4
#define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
#define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
#define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
#define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
#define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
#define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
((x) / 2))
#define ALARM2(x) ((x) << 8)
#define ADT7470_VENDOR 0x41
#define ADT7470_DEVICE 0x70
/* datasheet only mentions a revision 2 */
#define ADT7470_REVISION 0x02
/* "all temps" according to hwmon sysfs interface spec */
#define ADT7470_PWM_ALL_TEMPS 0x3FF
/* How often do we reread sensors values? (In jiffies) */
#define SENSOR_REFRESH_INTERVAL (5 * HZ)
/* How often do we reread sensor limit values? (In jiffies) */
#define LIMIT_REFRESH_INTERVAL (60 * HZ)
/* Wait at least 200ms per sensor for 10 sensors */
#define TEMP_COLLECTION_TIME 2000
/* auto update thing won't fire more than every 2s */
#define AUTO_UPDATE_INTERVAL 2000
/* datasheet says to divide this number by the fan reading to get fan rpm */
#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
#define FAN_PERIOD_INVALID 65535
#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
/* Config registers 1 and 2 include fields for selecting the PWM frequency */
#define ADT7470_CFG_LF 0x40
#define ADT7470_FREQ_MASK 0x70
#define ADT7470_FREQ_SHIFT 4
struct adt7470_data {
struct i2c_client *client;
struct mutex lock;
char sensors_valid;
char limits_valid;
unsigned long sensors_last_updated; /* In jiffies */
unsigned long limits_last_updated; /* In jiffies */
int num_temp_sensors; /* -1 = probe */
int temperatures_probed;
s8 temp[ADT7470_TEMP_COUNT];
s8 temp_min[ADT7470_TEMP_COUNT];
s8 temp_max[ADT7470_TEMP_COUNT];
u16 fan[ADT7470_FAN_COUNT];
u16 fan_min[ADT7470_FAN_COUNT];
u16 fan_max[ADT7470_FAN_COUNT];
u16 alarm;
u16 alarms_mask;
u8 force_pwm_max;
u8 pwm[ADT7470_PWM_COUNT];
u8 pwm_max[ADT7470_PWM_COUNT];
u8 pwm_automatic[ADT7470_PWM_COUNT];
u8 pwm_min[ADT7470_PWM_COUNT];
s8 pwm_tmin[ADT7470_PWM_COUNT];
u8 pwm_auto_temp[ADT7470_PWM_COUNT];
struct task_struct *auto_update;
struct completion auto_update_stop;
unsigned int auto_update_interval;
};
/*
* 16-bit registers on the ADT7470 are low-byte first. The data sheet says
* that the low byte must be read before the high byte.
*/
static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
{
u16 foo;
foo = i2c_smbus_read_byte_data(client, reg);
foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
return foo;
}
static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
u16 value)
{
return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
|| i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
}
/* Probe for temperature sensors. Assumes lock is held */
static int adt7470_read_temperatures(struct i2c_client *client,
struct adt7470_data *data)
{
unsigned long res;
int i;
u8 cfg, pwm[4], pwm_cfg[2];
/* save pwm[1-4] config register */
pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
/* set manual pwm to whatever it is set to now */
for (i = 0; i < ADT7470_FAN_COUNT; i++)
pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
/* put pwm in manual mode */
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
/* write pwm control to whatever it was */
for (i = 0; i < ADT7470_FAN_COUNT; i++)
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
/* start reading temperature sensors */
cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
cfg |= 0x80;
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
/* Delay is 200ms * number of temp sensors. */
res = msleep_interruptible((data->num_temp_sensors >= 0 ?
data->num_temp_sensors * 200 :
TEMP_COLLECTION_TIME));
/* done reading temperature sensors */
cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
cfg &= ~0x80;
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
/* restore pwm[1-4] config registers */
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
if (res) {
pr_err("ha ha, interrupted\n");
return -EAGAIN;
}
/* Only count fans if we have to */
if (data->num_temp_sensors >= 0)
return 0;
for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
data->temp[i] = i2c_smbus_read_byte_data(client,
ADT7470_TEMP_REG(i));
if (data->temp[i])
data->num_temp_sensors = i + 1;
}
data->temperatures_probed = 1;
return 0;
}
static int adt7470_update_thread(void *p)
{
struct i2c_client *client = p;
struct adt7470_data *data = i2c_get_clientdata(client);
while (!kthread_should_stop()) {
mutex_lock(&data->lock);
adt7470_read_temperatures(client, data);
mutex_unlock(&data->lock);
if (kthread_should_stop())
break;
msleep_interruptible(data->auto_update_interval);
}
complete_all(&data->auto_update_stop);
return 0;
}
static struct adt7470_data *adt7470_update_device(struct device *dev)
{
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long local_jiffies = jiffies;
u8 cfg;
int i;
int need_sensors = 1;
int need_limits = 1;
/*
* Figure out if we need to update the shadow registers.
* Lockless means that we may occasionally report out of
* date data.
*/
if (time_before(local_jiffies, data->sensors_last_updated +
SENSOR_REFRESH_INTERVAL) &&
data->sensors_valid)
need_sensors = 0;
if (time_before(local_jiffies, data->limits_last_updated +
LIMIT_REFRESH_INTERVAL) &&
data->limits_valid)
need_limits = 0;
if (!need_sensors && !need_limits)
return data;
mutex_lock(&data->lock);
if (!need_sensors)
goto no_sensor_update;
if (!data->temperatures_probed)
adt7470_read_temperatures(client, data);
else
for (i = 0; i < ADT7470_TEMP_COUNT; i++)
data->temp[i] = i2c_smbus_read_byte_data(client,
ADT7470_TEMP_REG(i));
for (i = 0; i < ADT7470_FAN_COUNT; i++)
data->fan[i] = adt7470_read_word_data(client,
ADT7470_REG_FAN(i));
for (i = 0; i < ADT7470_PWM_COUNT; i++) {
int reg;
int reg_mask;
data->pwm[i] = i2c_smbus_read_byte_data(client,
ADT7470_REG_PWM(i));
if (i % 2)
reg_mask = ADT7470_PWM2_AUTO_MASK;
else
reg_mask = ADT7470_PWM1_AUTO_MASK;
reg = ADT7470_REG_PWM_CFG(i);
if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
data->pwm_automatic[i] = 1;
else
data->pwm_automatic[i] = 0;
reg = ADT7470_REG_PWM_AUTO_TEMP(i);
cfg = i2c_smbus_read_byte_data(client, reg);
if (!(i % 2))
data->pwm_auto_temp[i] = cfg >> 4;
else
data->pwm_auto_temp[i] = cfg & 0xF;
}
if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
ADT7470_FSPD_MASK)
data->force_pwm_max = 1;
else
data->force_pwm_max = 0;
data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
if (data->alarm & ADT7470_OOL_ALARM)
data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
ADT7470_REG_ALARM2));
data->alarms_mask = adt7470_read_word_data(client,
ADT7470_REG_ALARM1_MASK);
data->sensors_last_updated = local_jiffies;
data->sensors_valid = 1;
no_sensor_update:
if (!need_limits)
goto out;
for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
data->temp_min[i] = i2c_smbus_read_byte_data(client,
ADT7470_TEMP_MIN_REG(i));
data->temp_max[i] = i2c_smbus_read_byte_data(client,
ADT7470_TEMP_MAX_REG(i));
}
for (i = 0; i < ADT7470_FAN_COUNT; i++) {
data->fan_min[i] = adt7470_read_word_data(client,
ADT7470_REG_FAN_MIN(i));
data->fan_max[i] = adt7470_read_word_data(client,
ADT7470_REG_FAN_MAX(i));
}
for (i = 0; i < ADT7470_PWM_COUNT; i++) {
data->pwm_max[i] = i2c_smbus_read_byte_data(client,
ADT7470_REG_PWM_MAX(i));
data->pwm_min[i] = i2c_smbus_read_byte_data(client,
ADT7470_REG_PWM_MIN(i));
data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
ADT7470_REG_PWM_TMIN(i));
}
data->limits_last_updated = local_jiffies;
data->limits_valid = 1;
out:
mutex_unlock(&data->lock);
return data;
}
static ssize_t show_auto_update_interval(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->auto_update_interval);
}
static ssize_t set_auto_update_interval(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct adt7470_data *data = dev_get_drvdata(dev);
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, 0, 60000);
mutex_lock(&data->lock);
data->auto_update_interval = temp;
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_num_temp_sensors(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->num_temp_sensors);
}
static ssize_t set_num_temp_sensors(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct adt7470_data *data = dev_get_drvdata(dev);
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, -1, 10);
mutex_lock(&data->lock);
data->num_temp_sensors = temp;
if (temp < 0)
data->temperatures_probed = 0;
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_temp_min(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
}
static ssize_t set_temp_min(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_min[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_temp_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
}
static ssize_t set_temp_max(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_max[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
}
static ssize_t show_alarm_mask(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%x\n", data->alarms_mask);
}
static ssize_t show_fan_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
if (FAN_DATA_VALID(data->fan_max[attr->index]))
return sprintf(buf, "%d\n",
FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
else
return sprintf(buf, "0\n");
}
static ssize_t set_fan_max(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp) || !temp)
return -EINVAL;
temp = FAN_RPM_TO_PERIOD(temp);
temp = clamp_val(temp, 1, 65534);
mutex_lock(&data->lock);
data->fan_max[attr->index] = temp;
adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_fan_min(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
if (FAN_DATA_VALID(data->fan_min[attr->index]))
return sprintf(buf, "%d\n",
FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
else
return sprintf(buf, "0\n");
}
static ssize_t set_fan_min(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp) || !temp)
return -EINVAL;
temp = FAN_RPM_TO_PERIOD(temp);
temp = clamp_val(temp, 1, 65534);
mutex_lock(&data->lock);
data->fan_min[attr->index] = temp;
adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
if (FAN_DATA_VALID(data->fan[attr->index]))
return sprintf(buf, "%d\n",
FAN_PERIOD_TO_RPM(data->fan[attr->index]));
else
return sprintf(buf, "0\n");
}
static ssize_t show_force_pwm_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->force_pwm_max);
}
static ssize_t set_force_pwm_max(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
u8 reg;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
mutex_lock(&data->lock);
data->force_pwm_max = temp;
reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
if (temp)
reg |= ADT7470_FSPD_MASK;
else
reg &= ~ADT7470_FSPD_MASK;
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->pwm[attr->index]);
}
static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, 0, 255);
mutex_lock(&data->lock);
data->pwm[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
mutex_unlock(&data->lock);
return count;
}
/* These are the valid PWM frequencies to the nearest Hz */
static const int adt7470_freq_map[] = {
11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
};
static ssize_t show_pwm_freq(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
unsigned char cfg_reg_1;
unsigned char cfg_reg_2;
int index;
mutex_lock(&data->lock);
cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
mutex_unlock(&data->lock);
index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
if (!(cfg_reg_1 & ADT7470_CFG_LF))
index += 8;
if (index >= ARRAY_SIZE(adt7470_freq_map))
index = ARRAY_SIZE(adt7470_freq_map) - 1;
return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
}
static ssize_t set_pwm_freq(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long freq;
int index;
int low_freq = ADT7470_CFG_LF;
unsigned char val;
if (kstrtol(buf, 10, &freq))
return -EINVAL;
/* Round the user value given to the closest available frequency */
index = find_closest(freq, adt7470_freq_map,
ARRAY_SIZE(adt7470_freq_map));
if (index >= 8) {
index -= 8;
low_freq = 0;
}
mutex_lock(&data->lock);
/* Configuration Register 1 */
val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
(val & ~ADT7470_CFG_LF) | low_freq);
/* Configuration Register 2 */
val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
(val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
}
static ssize_t set_pwm_max(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, 0, 255);
mutex_lock(&data->lock);
data->pwm_max[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_min(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
}
static ssize_t set_pwm_min(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, 0, 255);
mutex_lock(&data->lock);
data->pwm_min[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_tmax(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
/* the datasheet says that tmax = tmin + 20C */
return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
}
static ssize_t show_pwm_tmin(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
}
static ssize_t set_pwm_tmin(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->pwm_tmin[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_auto(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
}
static ssize_t set_pwm_auto(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
int pwm_auto_reg_mask;
long temp;
u8 reg;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
if (attr->index % 2)
pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
else
pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
if (temp != 2 && temp != 1)
return -EINVAL;
temp--;
mutex_lock(&data->lock);
data->pwm_automatic[attr->index] = temp;
reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
if (temp)
reg |= pwm_auto_reg_mask;
else
reg &= ~pwm_auto_reg_mask;
i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_auto_temp(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
u8 ctrl = data->pwm_auto_temp[attr->index];
if (ctrl)
return sprintf(buf, "%d\n", 1 << (ctrl - 1));
else
return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
}
static int cvt_auto_temp(int input)
{
if (input == ADT7470_PWM_ALL_TEMPS)
return 0;
if (input < 1 || !is_power_of_2(input))
return -EINVAL;
return ilog2(input) + 1;
}
static ssize_t set_pwm_auto_temp(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
long temp;
u8 reg;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = cvt_auto_temp(temp);
if (temp < 0)
return temp;
mutex_lock(&data->lock);
data->pwm_automatic[attr->index] = temp;
reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
if (!(attr->index % 2)) {
reg &= 0xF;
reg |= (temp << 4) & 0xF0;
} else {
reg &= 0xF0;
reg |= temp & 0xF;
}
i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_alarm(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
if (data->alarm & attr->index)
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static DEVICE_ATTR(alarm_mask, S_IRUGO, show_alarm_mask, NULL);
static DEVICE_ATTR(num_temp_sensors, S_IWUSR | S_IRUGO, show_num_temp_sensors,
set_num_temp_sensors);
static DEVICE_ATTR(auto_update_interval, S_IWUSR | S_IRUGO,
show_auto_update_interval, set_auto_update_interval);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 0);
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 1);
static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 2);
static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 3);
static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 4);
static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 5);
static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 6);
static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 7);
static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 8);
static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 9);
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 0);
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 1);
static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 2);
static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 3);
static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 4);
static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 5);
static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 6);
static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 7);
static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 8);
static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 9);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8);
static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
ADT7470_R1T_ALARM);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
ADT7470_R2T_ALARM);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
ADT7470_R3T_ALARM);
static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL,
ADT7470_R4T_ALARM);
static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL,
ADT7470_R5T_ALARM);
static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL,
ADT7470_R6T_ALARM);
static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL,
ADT7470_R7T_ALARM);
static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL,
ALARM2(ADT7470_R8T_ALARM));
static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL,
ALARM2(ADT7470_R9T_ALARM));
static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL,
ALARM2(ADT7470_R10T_ALARM));
static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
set_fan_max, 0);
static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
set_fan_max, 1);
static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
set_fan_max, 2);
static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max,
set_fan_max, 3);
static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
set_fan_min, 0);
static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
set_fan_min, 1);
static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
set_fan_min, 2);
static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
set_fan_min, 3);
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
ALARM2(ADT7470_FAN1_ALARM));
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
ALARM2(ADT7470_FAN2_ALARM));
static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
ALARM2(ADT7470_FAN3_ALARM));
static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
ALARM2(ADT7470_FAN4_ALARM));
static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO,
show_force_pwm_max, set_force_pwm_max, 0);
static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
static DEVICE_ATTR(pwm1_freq, S_IWUSR | S_IRUGO, show_pwm_freq, set_pwm_freq);
static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
show_pwm_min, set_pwm_min, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
show_pwm_min, set_pwm_min, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
show_pwm_min, set_pwm_min, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO,
show_pwm_min, set_pwm_min, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
show_pwm_max, set_pwm_max, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
show_pwm_max, set_pwm_max, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
show_pwm_max, set_pwm_max, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO,
show_pwm_max, set_pwm_max, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
show_pwm_tmin, set_pwm_tmin, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO,
show_pwm_tmin, set_pwm_tmin, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO,
show_pwm_tmin, set_pwm_tmin, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO,
show_pwm_tmin, set_pwm_tmin, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax,
NULL, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax,
NULL, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax,
NULL, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax,
NULL, 3);
static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
set_pwm_auto, 0);
static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
set_pwm_auto, 1);
static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
set_pwm_auto, 2);
static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
set_pwm_auto, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
show_pwm_auto_temp, set_pwm_auto_temp, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
show_pwm_auto_temp, set_pwm_auto_temp, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
show_pwm_auto_temp, set_pwm_auto_temp, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
show_pwm_auto_temp, set_pwm_auto_temp, 3);
static struct attribute *adt7470_attrs[] = {
&dev_attr_alarm_mask.attr,
&dev_attr_num_temp_sensors.attr,
&dev_attr_auto_update_interval.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp4_max.dev_attr.attr,
&sensor_dev_attr_temp5_max.dev_attr.attr,
&sensor_dev_attr_temp6_max.dev_attr.attr,
&sensor_dev_attr_temp7_max.dev_attr.attr,
&sensor_dev_attr_temp8_max.dev_attr.attr,
&sensor_dev_attr_temp9_max.dev_attr.attr,
&sensor_dev_attr_temp10_max.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp4_min.dev_attr.attr,
&sensor_dev_attr_temp5_min.dev_attr.attr,
&sensor_dev_attr_temp6_min.dev_attr.attr,
&sensor_dev_attr_temp7_min.dev_attr.attr,
&sensor_dev_attr_temp8_min.dev_attr.attr,
&sensor_dev_attr_temp9_min.dev_attr.attr,
&sensor_dev_attr_temp10_min.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp4_input.dev_attr.attr,
&sensor_dev_attr_temp5_input.dev_attr.attr,
&sensor_dev_attr_temp6_input.dev_attr.attr,
&sensor_dev_attr_temp7_input.dev_attr.attr,
&sensor_dev_attr_temp8_input.dev_attr.attr,
&sensor_dev_attr_temp9_input.dev_attr.attr,
&sensor_dev_attr_temp10_input.dev_attr.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
&sensor_dev_attr_temp4_alarm.dev_attr.attr,
&sensor_dev_attr_temp5_alarm.dev_attr.attr,
&sensor_dev_attr_temp6_alarm.dev_attr.attr,
&sensor_dev_attr_temp7_alarm.dev_attr.attr,
&sensor_dev_attr_temp8_alarm.dev_attr.attr,
&sensor_dev_attr_temp9_alarm.dev_attr.attr,
&sensor_dev_attr_temp10_alarm.dev_attr.attr,
&sensor_dev_attr_fan1_max.dev_attr.attr,
&sensor_dev_attr_fan2_max.dev_attr.attr,
&sensor_dev_attr_fan3_max.dev_attr.attr,
&sensor_dev_attr_fan4_max.dev_attr.attr,
&sensor_dev_attr_fan1_min.dev_attr.attr,
&sensor_dev_attr_fan2_min.dev_attr.attr,
&sensor_dev_attr_fan3_min.dev_attr.attr,
&sensor_dev_attr_fan4_min.dev_attr.attr,
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan2_input.dev_attr.attr,
&sensor_dev_attr_fan3_input.dev_attr.attr,
&sensor_dev_attr_fan4_input.dev_attr.attr,
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
&sensor_dev_attr_fan3_alarm.dev_attr.attr,
&sensor_dev_attr_fan4_alarm.dev_attr.attr,
&sensor_dev_attr_force_pwm_max.dev_attr.attr,
&sensor_dev_attr_pwm1.dev_attr.attr,
&dev_attr_pwm1_freq.attr,
&sensor_dev_attr_pwm2.dev_attr.attr,
&sensor_dev_attr_pwm3.dev_attr.attr,
&sensor_dev_attr_pwm4.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_enable.dev_attr.attr,
&sensor_dev_attr_pwm2_enable.dev_attr.attr,
&sensor_dev_attr_pwm3_enable.dev_attr.attr,
&sensor_dev_attr_pwm4_enable.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
NULL
};
ATTRIBUTE_GROUPS(adt7470);
/* Return 0 if detection is successful, -ENODEV otherwise */
static int adt7470_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
int vendor, device, revision;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
if (vendor != ADT7470_VENDOR)
return -ENODEV;
device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
if (device != ADT7470_DEVICE)
return -ENODEV;
revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
if (revision != ADT7470_REVISION)
return -ENODEV;
strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
return 0;
}
static void adt7470_init_client(struct i2c_client *client)
{
int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
if (reg < 0) {
dev_err(&client->dev, "cannot read configuration register\n");
} else {
/* start monitoring (and do a self-test) */
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
}
}
static int adt7470_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct adt7470_data *data;
struct device *hwmon_dev;
data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->num_temp_sensors = -1;
data->auto_update_interval = AUTO_UPDATE_INTERVAL;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->lock);
dev_info(&client->dev, "%s chip found\n", client->name);
/* Initialize the ADT7470 chip */
adt7470_init_client(client);
/* Register sysfs hooks */
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
adt7470_groups);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
init_completion(&data->auto_update_stop);
data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
dev_name(hwmon_dev));
if (IS_ERR(data->auto_update)) {
return PTR_ERR(data->auto_update);
}
return 0;
}
static int adt7470_remove(struct i2c_client *client)
{
struct adt7470_data *data = i2c_get_clientdata(client);
kthread_stop(data->auto_update);
wait_for_completion(&data->auto_update_stop);
return 0;
}
static const struct i2c_device_id adt7470_id[] = {
{ "adt7470", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adt7470_id);
static struct i2c_driver adt7470_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adt7470",
},
.probe = adt7470_probe,
.remove = adt7470_remove,
.id_table = adt7470_id,
.detect = adt7470_detect,
.address_list = normal_i2c,
};
module_i2c_driver(adt7470_driver);
MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
MODULE_DESCRIPTION("ADT7470 driver");
MODULE_LICENSE("GPL");